package day02;

import java.util.Scanner;

/**
 * Created by Administrator on 2023/6/30 0030.
 */
public class ParseDouble {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        String str = cin.next();
       // double x = Double.parseDouble(str);
        System.out.println(checkDouble(str));
    }

    private static boolean checkDouble(String str) {
        try {
            Double.parseDouble(str);
            return true;
        } catch (Exception e) {
            return false;
        }
    }
}
